chore(runtime): add computed root values test (#12830) d17e462c1a

Co-authored-by: hernan <hernan@rive.app>

Author: bodymovin

.rive_head

@@ -1 +1 @@
-3a7bd9bfdfa9b2c36abd0d0040ae240934902530
+d17e462c1a234f369a92cdf723d3a6b312219b1f

tests/unit_tests/assets/computed_values_test.riv

@@ -0,0 +1,39 @@
+#include <rive/file.hpp>
+#include <rive/node.hpp>
+#include <utils/no_op_renderer.hpp>
+#include "rive/animation/state_machine_instance.hpp"
+#include "utils/serializing_factory.hpp"
+#include "rive_file_reader.hpp"
+#include <catch.hpp>
+#include <cstdio>
+
+using namespace rive;
+
+TEST_CASE("Computed root values", "[silver]")
+{
+    SerializingFactory silver;
+    auto file = ReadRiveFile("assets/computed_values_test.riv", &silver);
+
+    auto artboard = file->artboardDefault();
+    silver.frameSize(artboard->width(), artboard->height());
+
+    auto stateMachine = artboard->stateMachineAt(0);
+
+    auto vmi = file->createDefaultViewModelInstance(artboard.get());
+    stateMachine->bindViewModelInstance(vmi);
+
+    auto renderer = silver.makeRenderer();
+    stateMachine->advanceAndApply(0.0f);
+    stateMachine->advanceAndApply(0.016f);
+    artboard->draw(renderer.get());
+
+    int frames = (int)(2.0f / 0.032f);
+    for (int i = 0; i < frames; i++)
+    {
+        silver.addFrame();
+        stateMachine->advanceAndApply(0.032f);
+        artboard->draw(renderer.get());
+    }
+
+    CHECK(silver.matches("computed_values_test"));
+}